Paying attention to packing issues can help reduce leakage in PTFE lined valves

Paying attention to the issue of fillers can be helpful PTFE lined valve Reduce leakage.
Packing, as a sealing material for PTFE lined valves, is used to fill the packing box. The function of packing is to prevent the medium from leaking out from the gap between the valve stem and the packing box. The lifespan of a valve also largely depends on the lifespan of its sealing surface and packing system. So, it is important to pay attention to the packing problem of PTFE lined valves. Requirements for packing of PTFE lined valves: 1. Corrosion resistance; 2. Good sealing performance; 3. The friction coefficient is small.
In valve failures, the most common problem is leakage, and packing leakage is a more common and difficult problem to overcome. Possible reasons for packing leakage include: rough packing and high hardness; The inner wall of the stuffing box is rough in processing; Insufficient stiffness of the valve stem causes bending when closed; The accuracy of the valve stem is not high; The surface of the valve stem is rough; The material is not resistant to medium corrosion; Packing installation errors, etc. These are all reflected in the design and manufacturing quality issues of filler material selection, selection, processing, assembly, etc.